Miliote would not comment on the possibility of state police detectives working toward a second arrest or whether 22-year-old Flavio “Sass” Daveiga might be charged with murder.

Daveiga so far is charged with witness intimidation and accessory before the fact of murder. He’s been held on $2 million bail since his arraignment last November in Taunton District Court.

Prosecutors allege Daveiga, who has a lengthy criminal record, was involved in the death of former Taunton resident Edwin Rivera Jr.

Rivera’s body was found Nov. 25, 2013, after a CSX engineer reported that his train ran over a body on tracks in an industrial area near Cushman Street.

Police initially thought Rivera, whose arm was severed, died when he was struck by the slow-moving train. But an autopsy revealed Rivera died after being shot twice, once from the front and once from the back.

Prosecutors allege Rivera’s death resulted from a drug dispute with Daveiga. They have also said cellphone and text messages indicate the two men communicated with one another not long before Rivera was hit by the train.

Taunton Police Chief Edward Walsh referred all questions regarding the case to the district attorney’s office.

Daveiga’s next court appearance in Fall River Superior Court is a pretrial conference scheduled for Aug. 12.

Police previously said they found Daveiga’s fingerprints on a Gatorade bottle he bought for the victim at a nearby convenience store.

Daveiga, despite his age, was no stranger to law enforcement before Rivera’s death.

Court records show he was arrested for heroin possession in July 2013 after a motor vehicle stop by Taunton police. He was also arrested in 2012 in the city within a week of being shot in the neck in Fall River, police said.

In February 2013, Daveiga was among 10 men and women arrested on heroin trafficking charges after Taunton police executed a search warrant at a Harrison Avenue apartment.

Rivera, who was 24 when he died, was arrested in 2012 in connection to the armed kidnapping of a 31-year-old Taunton man, who police said was not injured.

A photo of Rivera, showing him handcuffed and sitting on a curb, appeared in the Taunton Daily Gazette the next day.